Alphanumeric input keyboard



FIG. 1 is a front plan view of an alphanumeric input keyboard showing my new design;

FIG. 2 is a right side elevational view, the left side view being a mirror image thereof,

FIG. 3 is a front view thereof, but shown in an alternate position;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The portions of the alphanumeric input keyboard shown in dot-dot-dash broken lines form no part of the claimed design. The drawing is lined for color. The evenly spaced horizontally parallel broken lines shown in various locations indicate a change in color. 

CLAIM The ornamental design for an alphanumeric input keyboard, as shown and described. 